<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>hello world</title>
    <script src="https://unpkg.com/vue@next"></script>
</head>

<body>
    <div id="root"></div>
</body>

<script>
    Vue.createApp({
        data() {
            return {
                content: 'hello world'
            }  
        },
        methods:{
            handlerBtnClick() {
                alert('hello');
            }
        },
        template: `
        <div>
            {{content}}
            <button v-on:click="handlerBtnClick">反转</button>
        </div>`
    }).mount('#root');
</script>

</html>